Tetrapeptide-138
A cosmetic ingredient used as hair conditioning, humectant, skin conditioning - miscellaneous in skincare, haircare, and personal-care products sold in the European Union.
What is it?
Tetrapeptide-138 is the synthetic peptide consisting of arginine, glutamine, leucine and tryptophan.
What does it do?
Tetrapeptide-138 is listed in the EU cosmetic ingredient inventory with the following declared functions:
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Hair conditioning
improves the appearance, feel, and manageability of hair
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Humectant
draws moisture from the air or deeper skin layers to the surface, helping skin retain water
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Skin conditioning - miscellaneous
improves skin condition through mechanisms not classified under the more specific emollient or humectant subcategories
EU regulatory status
Tetrapeptide-138 is allowed for use in cosmetic products in the European Union under Regulation 1223/2009. It is not subject to a specific Annex restriction at the time of writing.
Frequently asked questions
What is Tetrapeptide-138?
Tetrapeptide-138 is a cosmetic ingredient catalogued in the EU CosIng database. Tetrapeptide-138 is the synthetic peptide consisting of arginine, glutamine, leucine and tryptophan.
Is Tetrapeptide-138 allowed in cosmetics in the EU?
Yes. Tetrapeptide-138 is allowed for use in cosmetic products in the EU under Regulation 1223/2009.
What does Tetrapeptide-138 do in cosmetic products?
Tetrapeptide-138 is declared in the EU cosmetic ingredient inventory with these functions: hair conditioning, humectant, skin conditioning - miscellaneous.
Related ingredients
Source: EU CosIng database (European Commission). This page is derived from public-sector information published by the European Commission. · Last updated: 19/11/2024